jtodd wrote:

It should be just
1. metal detector
2. explosives sniffer/detector
3. bag screen for gun or explosives

Exactly. Nothing more, nothing less.

The idea that pax could just walk through a tunnel and be 'screened' is great except for the dosing of radiation that we all don't need. And without iris scanning, etc. But a system that could scan for WEI, and nothing more, without the silly intrusions of smurfs is potentially a better option.